Metallic cross-arm for telegraph or telephone poles.



WELLINGTON S. CLAY, OF HUTOHIN SQN, llllN-NESQTAL METALLIC CROSS-ARM FORTELEGRAPH OR TELEF'HONE. POLES.

Specification of Letters Patent.

Patented Oct. 22, 1907.

Application filed September 7, 1906. Serial No- 333,602;

To all whom it may concern.-

Be it known that LAVELLINGTON S. CLAY, a citizen of the United States,residing at Hutchinson in the.

county of McLeod and State of Minnesota, have invented certain new anduseful Improvements in Metallic OrossArms for Telegraph or TelephonePoles; and I do hereby declare the following to be a full, clear, andcxact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention has for its object to provide an improved metallic crossarm for telegraph and telephone poles, and t this end it consists of thenovel devices and combinations of devices hereinafter described anddefined .in the claims.

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts Jugs 7 throughout th 0 several views.

Referring to the drawings :Figure l is a plan view with some partsbroken away, showing the improved cross arm applied to a telegraph pole.Fig. 2 is an (510- vation of the parts shown in Fig. 1. Fig. 3 is atransverse section taken on the line 9: :0 of Fig. 2. Fig. 4 is a planview showing oneend portion of the cross arm, and Fig. 5 is a transversesection taken on the line 2: x of Fig. 2. i i

The numeral 1 indicates an ordinary telegraph or telephone pole. Themetallic cross arm 2 is in the form of a channel iron bar positionedwith its back or vertical web against the pole, and with its flangesprojetting in horizontal-planes, one over the other.

The numeral 3 indicates a yoke-like clamp which embraces about the poleand engages about one-half thereof, and the arms of which are turnedoutward in reverse directions, and are perforated to pass therethroughshort bolts l. The bolts 4 are passed through perforations 5 in the Webof the cross arm 2, and they are provided with nuts 6 which, in thepreferred arrangernent, engage the inner surface of the vertical web ofsaid cross arm, and are held against rotation by ment, the-nuts o aretightened upon the boltsd by applying a wrench to the heads of thebolts. When the nut bolts are tightened up, the clamping yoke 3 will betightly drawn up against the pole, and the said pole Will be tightlyclamped between the said yoke and the back of the cross arm. To securelyanchor the cross arm and the yoke to the pole, a barb 8 is pressedoutward from the back of the vertical web of said arm and is pressedinto the pole, and the yoke is provided, preferably both at its upperand lower edges, with inwardly turned barbs 9 tliat are also'prcssedinto the pole. A lag screw 10 is also preferably passed through aperforation inthc yoke 3 and screwed into the pole. By the meansdescribed, the cross arm will be very firmly anchored to the pole. infact, by the arrangesccurcd on said cross arm. With: this arrange-'bolts passed through the ends 'of ment described, the cross arm may beso securely an- I with laterally projecting heads 12 that are adapted tobe inserted through slots 13 in the ,web of the cross arm when turnedparallel therewith, and which are adapted to be interlocked to saidcrossarms, when said braces arcturned into the angular positions shown inFig. 2. The lower ends of the bracing arms 11 are preferably lapped andsecured to the pole by a lag screw 14.

The insulating caps 15 are, as shown, secured to their wooden supportingpins in the tisualway' These sup porting pins 16 are made quite long,and are passed through vertically alined perforations zontal flanges ofthe, cross arm 2. The said pe'rforations 17 are formed withirregularsurfaces, or with inwardly projecting barbs that are pressed slightlydownward, so that the pins 16 may be quite readily driven through saidperforations, but will be held firmly 17 in the h0ri-.

against displacement, or in other words, so that they cannot be readilyWithdrawn from the said perforations or seats 17.

A cross arm of the above characterfs not only much stronger and moredurable than the wooden cross arms usually employed, but thdy may beapplied to apole" with much less labor, and in very much shorterinterval oftime. Furthermore, the said cross arms may be quickly removedfrom a pole, and may be used over and over again, almost indefinitely.

What I claim is 1. The combination with a metallic dross arm for atele-.

of means for detachably securing graph or telephone pole,

said cross arm to the po e, and bracing arms having parts that interlockwith said cross arm at their upper ends by angular movement, andsecurnblo to the pole at their lower ends, substantially as described.

'2. The combination with a channel shaped metallic cross arm for atelegraph or telephone pole, of a clamping yoke extending half wayaround said pole and having approximately parallel end extensions without turned extremities, and nutted clamping bolts passed through theout, turned extremities of said clamping yoke and through the verticalweb of said cross arm, substantially as de scribed.

The

combindtlon with a channel shaped metallic cross arm for a telegraph ortelephone pole, the same having slots 13 in itsvcrtical Web, of aclamping yoke, nuttcd said clumping yoke and through the vertical wcb ofsaid cross arm. and bracing arms 11-, having at their upper endslaterally projecting heads 12, arranged to be interlocked with said.slots 13 by angular movemenls of said arms 11; substantially asdes'r-l'ilictl. i

Ill-5 Q, Seems 4. The cbmblnation with a channel shaped metallic crossarm for a telegraph or telephone pole, the same hav- TFtlng abarhprojccting frcm the back of its web and en- Qgageahle with the phle,a clamping yoke having barbs engageable with the pole, and nutted boltspassed through the ends of said clamping yoke and through the verticalweb of said Clp arm, substantially as described,

5 A\ channel shaped metallic cross arm for a telegraph or telephonefpdle, provided with vertically alined pin seats 1'7, formed withinwardly projecting barbs for en- 10 gaging and'holding the pins,substantially as described.

In testimony whereof I atfix iny signature in presence of twowltnesses.

WELLINGTON s. CLAY.

Witnesses:

MALIE Honn,

F. D. MERCHANT.

